The Collaborative International Dictionary of English v.0.48:

Toot \Toot\, v. i. [OE. toten, AS. totian to project; hence, to
   peep out.] [Written also tout.]
   1. To stand out, or be prominent. [Obs.] --Howell.
      [1913 Webster]

   2. To peep; to look narrowly. [Obs.] --Latimer.
      [1913 Webster]

            For birds in bushes tooting.          --Spenser.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\ (t[=oo]t), n. [Prob. fr. F. tout all.]
   In the game of solo, a proposal to win all eight tricks.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\, v. i. [See 3d Toot. ]
   To toot a horn.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\, v. t. (Horse Racing)
   (a) To spy out information about, as a racing stable or
       horse. [Cant, Eng.]
   (b) To give a tip on (a race horse) to a better with the
       expectation of sharing in the latter's winnings. [Cant,
       U. S.]
       [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\, n.
   The anus. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\ (t[=oo]t), v. i. [See 1st Toot.]
   1. To act as a tout. See 2d Tout. [Cant. Eng.]
      [1913 Webster]

   2. To ply or seek for customers. [Prov. Eng.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\ (tout; t[=oo]t; Scot. & dial. t[=oo]t), v. i. [imp.
   & p. p. Touted; p. pr. & vb. n. Touting.]
   1. To look narrowly; spy. [Scot. & Dial. Eng.]
      [Webster 1913 Suppl.]

   2. (Horse Racing)
      (a) To spy out the movements of race horses at their
          trials, or to get by stealth or other improper means
          the secrets of the stable, for betting purposes.
          [Cant, Eng.]
      (b) To act as a tout; to tout, or give a tip on, a race
          horse. [Cant, U. S.]
          [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Tout \Tout\, n.
   One who secretly watches race horses which are in course of
   training, to get information about their capabilities, for
   use in betting. [Cant. Eng.]
   [1913 Webster]

   2. One who gives a tip on a race horses for an expected
      compensation, esp. in hopes of a share in any winnings; --
      usually contemptuous. [Cant, U. S.]
      [Webster 1913 Suppl.]

   3. One who solicits custom, as a runner for a hotel, cab,
      gambling place. [Colloq.]
      [Webster 1913 Suppl.]

   4. A spy for a smuggler, thief, or the like. [Colloq.]
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

tout
    n 1: someone who buys tickets to an event in order to resell
         them at a profit [syn: tout, ticket tout]
    2: someone who advertises for customers in an especially brazen
       way [syn: tout, touter]
    3: one who sells advice about gambling or speculation
       (especially at the racetrack) [syn: tipster, tout]
    v 1: advertize in strongly positive terms; "This product was
         touted as a revolutionary invention"
    2: show off [syn: boast, tout, swash, shoot a line,
       brag, gas, blow, bluster, vaunt, gasconade]

Moby Thesaurus II by Grady Ward, 1.0:

147 Moby Thesaurus words for "tout":
   acclaim, adherent, adventurer, adviser, advocate, aggrandize,
   amplify, announcer, annunciator, applauder, appreciator, authority,
   back, ballyhoo, ballyhoo man, ballyhooer, barker, betting ring,
   bettor, boneshaker, boost, booster, buff, build up, burlesque,
   canvasser, cardshark, cardsharp, cardsharper, caricature,
   carry too far, channel, claqueur, commend, commender, communicant,
   communicator, compulsive gambler, crap shooter, cry up, dopester,
   draw the longbow, encomiast, enlightener, eulogist, eulogizer,
   exaggerate, expert witness, extoller, fan, gambler, gamester,
   go to extremes, gossipmonger, grapevine, hawk, hazarder, herald,
   hype, hyperbolize, informant, information center,
   information medium, informer, interviewee, laud, lauder, lay it on,
   magnify, make much of, monitor, mouthpiece, newsmonger, notifier,
   overcharge, overdo, overdraw, overestimate, overpraise, overreach,
   overreact, oversell, overspeak, overstate, overstress, panegyrist,
   peddle, petty gambler, piker, pile it on, pitchman, player, plug,
   plugger, plunger, praise, praiser, press, proclaim, promote,
   promoter, public relations officer, publicize, publisher, puff,
   puffer, punter, push, radio, recommend, reporter, rooter, sell,
   sharp, sharper, sharpie, solicitor, source, speak highly of,
   speak warmly of, speak well of, speculator, spieler, spokesman,
   sport, sporting man, sportsman, stretch, stretch the truth,
   support, surveillance, talk big, talk in superlatives, television,
   teller, tinhorn, tipster, touter, travesty, trumpet, venturer,
   vigil, vigilance, wagerer, watch, watch and ward, witness